Power cutting, grading machine.



A. F. PRESTON.

POWER CUTTING, GRADING MACHINE.

APPLIOATION FILED 00T.10, 1912.

1,105,534. Patented July 28,1914.

6 SHEETSSHEET 1.

witnesses Evenly 7" A. F. PRESTON.

POWER CUTTING, GRADING MACHINE.

APPLICATION FILED OOTJO, 1912.

Patented July 28, 1914.

5 SHEETS-SHEET 2.

w wg% THE NORRIS PETVERS CO, PHOI'OJJTHQ, WASHINGTON. D. C,

A. F. PRESTON.

POWER CUTTING, GRADING MACHINE.

APPLICATION FILED 001210, 1912.

a V l /H a 6 SHEETS-SHEBT 3.

Zizvmlvr JZ/ I'Pres tan.

Patented July 28, 1914,

IHE NORRIS PEFERS C0,, PHOTU-LITHO WASHINGYDN. v, \;v

A. P. PRESTON.

POWER CUTTING, GRADING MACHINE.

APPLICATION FILED 00T.10,1912.

1,105,534. Pa ented July 28, 1914,

5 BHEETS8HEET 4.

THE NORRIS PETERS CO. PHOTOLITHO, WASHINGTON,

A. P. PRESTON.

POWER CUTTING,

GRADING MACHINE.

APYLIOATION FILED 0OT.10,1012.

Patented July 28, 191 i W m "a m e r p H a PQFMMN w V T \M o Q \x un vn R 8% M THE NORRIS PETERS CO PHOIOLNHOH WASHINGTON. u c

ALBERT F. PRESTON, OF BOSTON, MASSACHUSETTS.

POWER CUTTING, GRADING MACHINE.

Specification of Letters Patent.

Application filed October 10, 1912.

Patented July 28, 1914.

Serial No. 725,075.

To all whom it may concern:

Be it known that I, Annnrrr F. PRESTON, a citizen of the United States. and resident of Boston, in the county of Suffolk and State of Massachusetts, have. invented certain new and useful Improvements in Power Cutting, Grading Machines, of which the following is a specification.

The present invention relates to a machine adapted to be driven by power for cutting patterns of various sorts and at the same time grading the patterns to a larger or smaller size with respect to a model or primary pattern-Which is used as a guide.

The particular work for which the machine is designed is toproduce patterns for the parts of boots and shoes, but it is not limited to this particular purpose and may be employed to cut patterns for other purposes as Well.

The objects of the invention are to provide a machine of this character with means by which the pattern to be produced may be graded from imaginary lines at any desired one of a number of different distances from one or more of the edges of the model pattern either within or outside of such edges; to provide novel and easily operated means for changing the size of the pattern to be produced; to provide novel means for holding the cutting knife; to provide an improved jack for the model and the sheet of stock from which the secondary pattern is to be cut; and to provide other improve ments hereinafter fully described.

In the accompanying drawings Figure 1 represents in plan view a machine exemplifying the preferred embodiment of means for carrying out the foregoing objects. F ig. 2 is a longitudinal section of a part of this machine. Fig. 3 is an elevation partly in section of the jack which forms a part of the machine. Fig. 4 is an end View of the cooperating cutters. Fig. 5 is an end view in detail of one of the clamping members for the model pattern and the blank. Fig. (5 is a plan view of the linkage or pantograph mechanism by which the secondary pattern is caused to vary in size from the model pattern. Fig. 7 is a detail plan view of a part of this mechanism. Fig. 8 is an elevation of part of this mechanism viewed from the direction of the arrow A in Fig. 6. F 9 is a sectional. view of the same mechanism taken on the line 9-$) of Fig. (3. Fig. 10 is a cross section of the adjusting means of the said mechanism by which variations in size are provided for. Fig. 11 is a detailed view of the cooperating cutters and the means for operating them. Fig. 12 is a detail of a part of such operating niechanism. Fig. 13 is a perspective view of one of the cutters. Fig. 14 is a plan view showing in superposed relation a standard, or model, pattern and a secondary pattern of larger size graded therefrom. Fig. 15 is a view similar to Fig. 2 but on an enlarged scale showing an arrangement for enabling internal edges of a model pattern to be accurately reproduced.

The same reference characters indicate the same parts in all the figures.

The operating parts of the machine are supported by a table 1 of composite construction consisting of alternating bars 2 and 3 of steel and wood, respectively, arranged transversely of and secured to longitudinal holding bars 4t. The steel bars 2 have their upper surfaces all in one plane to support the movable model and stockholding jack and are separated from one another so as to reduce the weight of the table. The wooden bars are provided to fill the spaces between tl 3 steel bars. Their upper surfaces are below the upper surfaces of the steel bars so that they will not come in contact with the base of the movable jack. The object of this construction is to provide an all-steel supporting surface, relatively small in bearing area, so that the friction, resisting movement of the ack, will be the least possible.

The jack is designated as a whole by the character 5 and it has a base (3 suiiiciently extensive to overlie several of the steel bars, as shown in Fig. 1, and have an even bearing thereon. The upright part of the jack is relatively long and narrow and has deep horizontal slots 7, 8, 9 extending from one end, the slot 7 being adapted to contain a. model pattern 10 and the slot 9 to contain a sheet of stock 11 from which the secondary or graded pattern is to be out. In the end of the jack at which the slots open is mounted clamping means consisting of a head 12 on a stem 13 mounted in the lowermost arm of the jack, a coinplemental head 14 on the lower end of a stem 15 contained in the middle arms of the jack, :1 head 16 on the upper end of said stem 15, and a head 17 cooperating with head 16 and carried by a stem 18 contained in the uppermost arm of the jack. The stems and 18 are free to slide endwise 1n the arms which carry them, stem 15 being contained in a sleeve or bushing 19 with. which are connected other parts of the mech-' anism to be described. A cam lever 20 is pivoted by a pin 21 between cars 22 on the top of the jack directly overthe stem 18. This cam lever has an eccentric portion 23 adapted to bear on the end of stem 18 when the lever is put in the position shown in 3, and to press said stem toward the stem 15 and the latter toward the head 12. V7 hen the model pattern is placed between the heads 16 and 17 and a sheet of stock is placed between the heads 12 and 14, the cam lever causes both the model and the stock to be clamped inone act. Preferably the heads 17 and 14 carry pointed pins 24 adapted to penetrate the pattern and stock, respectively, to insure retention. of these parts against displacement. All of the stems carrying the heads are freely rotatable in their bearings, so that the pattern and stock may be rotated.

Secured to the table by means of bolts 25 or equivalent fastening means is a cutter head 26 having a horizontal slot 27 at the height of the slot 9 in the jack. Slot 27 is adapted to receive the edges of the blank sheet .11 which are to be cutaway in forming the secondary pattern, and the cutter head is of such length that the slot may be deep enough to admit the projecting edges of a large blank sheet. In the lower part of the cutter head below slot 27 is mounted a horizontal shaft 28, which, on its Outer end carries a fast driving pulley 29 and a loose pulley 30, the latter being directly supported on a sleeve which surrounds the shaft, as shown in Fig. 2. On the inner end of the shaft, which terminates near the inner end of the cutter head, there is secured an eccentric crank pin 31 carrying an antifriction roll which enters a notch 33 (see 11) in a cutter holder or block 34. Said cutter holder is adapted to reciprocate in a vertical guideway 35 on the end of the cutter head. The sides of this guideway are recessed at 36, 37 to give room for the revolution of roll 32. The outer sine of the guideway is closed by a removable plate 38. The cut-ter block 34 carries a cutter or knife 39, which will be presently described. That portion of the cutter head above slot 27 forms an arm 40 on the end of which is a complemental cutter 41 formed preferably as a disk secured by a screw stud 42. The knife 39 in its reciprocations passes back and fort-11 across the edge of the disk 41 substantially in con tact with the face of the disk so as to insure cutting the stock which extends between the disk and knife. The disk may be turned about the screw stud when its edge becomes dull to place a sharp portion of the edge adjacent to the knife, and may then be secured by tightening up the screw.

A feature of great practical importance resides in the mode of securing the knife in the carrying block. Such knife is a prismatic bar having one end beveled to form a cutting edge, and the block has a socket in its end of a size and shape to provide a close fit for the bar. Said bar is either slightly bent transversely of its length or it may be twisted, or both bent and twisted, as indicated in Fig. 13, so that it will not enter freely into the socket but will bind on the walls of the latter with resilient pressure, allowing it to be forced in or out without damage but absolutely preventing it from working loose or from fallingor jumping out of the socket. A hole of smaller size than the socket passes entirely through the knife block so that a pin or rod may be inserted to drive out the knife when necessary.

A proportional motion linkage or pantograph mechanism connects the ack with the cutter head and with aguide, presently to be described. This linkage is shown in Fig. 6. It comprises essentially a bar 43 pivoted to a block 44, which is connected with the jack, an extensible link 45 pivoted at to the bar 43, and a rod 47 which passes through the block 44. Said block extends into the slot 8 of the jack and has anopeni ngtl irough which pass the sleeve 19 and stem 15, pre viously described, by which the block is pivotally connected to the ack. Block 44.,has a guide element 48 through which the rod 47 is adapted to pass freely. Said rod 47 near its end remote from the jack passes through and is secured to a block 49 (Fig. 8) which block has cars 50 pivotally connected by pivot pins or studs 51 with the extensible link 45. For convenience of construction the block 49 is preferably made composite and the cars 50 instead of being formed upon the body of the block are made as parts of plates 51 secured upon the upper and lower faces, respectively-of the block. Another block 52 is slidingly mounted on the rod 47 and has an arm 53 rigidly projecting, which is pivotally connected with the link 45 and forms the fourth member of the pantograph linkage. The link 45 is of composite structure, as shown best in Fig. 9, and consists of parallel bars to which the character 45 is applied, each of said bars being engaged at one end with one of the pivot studs 51 and being connected together and to the bar 43 at the other end by the pivot 46, which is an internally threaded tube at the ends of which are screws 54 which. hold the bars 45 in place. The link bar lies between bars 45 and is flanked by collars 55, also located between the bars 45. Said bars 45 have longitudinal guideways 56 on their inner sides in which are contained slides 57 secured at one end to a block 58 which fills the space be tween the slides, and at the other end pivoted to a block 59 by pivot studs 60. Said block 59 has an aperture through which passes the rod 53 with a close sliding fit. The members 57 and 58 together form a slide movable longitudinally of the link 45 and having a swivel bearing for the bar 53. Thereby when the block 44 is moved toward or from the block 49, assuming the latter block to be held fast, the sliding block 52 is moved through distances less than, but proportional to, the distances through which the block 44 is moved. Either the block 49 or the block 52 may be connected to the cutter head, and a guide for the model pattern may be connected to that block which is free from the cutter head, according as the secondary pattern is to be made larger or smaller than the model pattern. The connection with the cutter head is made through a slide 61 longitudinally movable in a guideway on the top of the cutter head arm 40 and connected pivota-lly by means of a pivot 62 with a bar 63 contained in both the block 49 and the block 52. A second bar 64 similar to the bar 63 is guided in the blocks 49 and 52 and carries a pivot 65 with which a holder 66 for a rod 67 is engaged. Said holder has a longitudinal guideway 68 in which rod 67 fits and is longitudinally adjustable, and the rod carries a guide or gage 69 at a height such that it is engaged by the edge of the model pattern. Bars 63 and 64 each have holes adapted to be placed in registry with holes in either the block 49 or the block 52, and when so placed, to be locked by pins 71 and 72. As shown in the drawings, bar 63 is locked by. pin 72 to the block 49 and bar 64 is locked to block 52 by the pin 71.. Consequently block 49 is connected with the cutter head, and the pattern guide 69 is connected with block 65 and the apparatus is set for producing enlarged patterns, but the arrangement may easily be re versed by shifting the bars and pins so that the pattern guide 69 will then be farther from the work-holding jack than the cutters and the graded pattern will be smaller than the model. A feature of construction which increasesthe efficiency and reduces the expense of the machine is that the guideways in the blocks 49 and 52 are made as open slots formed in the top and bottom faces of these blocks, respectively, and the bars are retained therein by the plates 51.

The model guide 69 and pivot 62 may be so placed that the grading; of the secondary pattern may be made either from the edge Off the standard pattern or from an imaginary line running parallel to such edge at any desired one of several distances inside or outside of such edge. This is for the purpose of allowing amounts of uniform width to be left on the edges of all sizes of graded patterns, to provide for uniform seam overlap of the parts of the shoe upper, or for a fold, without increasing or diminishing the amount of such overlap or fold proportionately to the enlargement or reduction of the graded pattern from the model. In shoe making it is customary to allow the same amount in all sizes for seam overlap of the parts of the shoe upper, but when the secondary pattern is graded from the seam edges of the model, the overlap is proportionately increased or reduced from that of the model and an error is produced. To overcome this error is the purpose for providing the slide 61 and the rod 67. The guide or holder 66 has a number of holes 73 spaced at predetermined distances apart and the bar 67 carries a pin 7 4 adapted to be put in any one of these holes. Thus the guide 69 may be arbitrarily placed at various distances from the line of the cutters, and on either side of this line. Likewise the cutter head has a series of correspondingly spaced sockets 75 into any one of which a pin 76, which passes through the slide 61, may be placed according to the position of the slide. On the holder 66 is a graduated scale with which an index 77 on the rod 67 cotiperates to indicate the adjustments. A similar scale 7 6 is provided on the bar 61, and an index 77 is placed on the cutter head beside the bar 61 to coiiperate with scale 7 6. Any arbitrary indicating characters may be used upon these scales. Then both indexes are set beside the character 1 of these scales, the mechanism is set for producing what I call the geometric grade, in which the secondary pattern is proportionately graded from the edges of the model, because placing the index of the slide 61 beside the character 1 of that scale which extends beside the sockets 75 locates pivot 62, which is the pivot of the linkage as a whole, in line with the knives, and the same character of that scale on the holder 66, in coiiperation with index 77, locates guide 69 in line with pivot 65. When the model guide is set back one space, or until the index 77 is opposite the character A, as shown in Fig. 6, the pattern and stock are carried farther over the knife so that a strip equal in width to the space between 1 and A on the scale will be cut from the secondary pattern back of what should be the edge of the proportionately enlarged pattern. If, however, before cutting, the slide 61 is set forward by the same amount, the effect is as though this strip had been reattached to the pattern. The result is that of grading the secondarv pattern from a line located back of the edge of the model by a distance equal to the space between 1 and A, leaving a marginal portion of the secondary pattern of uniform width and ungraded. This distance in the machine illustrated is about one-sixth of an inch and is one-half so t grading may be thus extended, restricted,

' over the insole in lasting.

WWW"

of the amount .of the usual seam overla of theparts ofshoeuppers. It is also slig tly more than the amount left :for "turning over the leather on-folded and corded edges and for the seam at the back of a.shoe,and somewhat less than the amount which is drawn Some parts of shoe uppers,such.as quarters, have all their edgeseitlier overlapped with other pieces or turned over, and the amounts of such laps and turnovers are approximately equal to, or not widely variant from, the width of the ungraded strip when the adjustment is at the graduation A, which adjustment I term the automatic grade." Accordingly, when grading a pattern for such a part, instead of changing from the automatic grade adjustment, after grading and overlapping edge, to the geometricgrade orsome special grading adjustment at the folded, corded, back seam, .or lasting .edges, and changing back again to the automatic grade, I keep the adjustment always at the automatic grade. I find that this mode of procedure produces a :better graded pattern, .nearly halves the time required -:to grade it, and is less confusing to the operator and thereby eliminates liability of producing an incorrect pattern. These advantages follow because the ungradedistrip on all the edges of the secondary pattern is equal to theamount of overlap of that edge which comes contiguous .to the edge .of another part of the upper, is approximately .equal to the excess required for the fold .or cording and for the back (seam, and is not Very much less than the width vof the flap required to 'hold the tacks in lasting; and because the :loss of time required to shift the adjustment twice in grading out and cutting each pattern, and the confusion resulting therefrom to the operator, are eliminated. lVhen the grade is to be still further restricted, that is, to be made from an imaginary line farther back from the edge of the model, the guide .69 is moved a farther distance to the right and the pivot-carrying slide is set an equal amount over to the left, (the directions named being with reference to the position of the machine shown in the d'rawings,) the distances being measured by the characters ranging from 10 to '60 and equally spaced on both scales, but running in opposite directions respectively on the respective scales. This produces what I term the restricted grade. hen the grading is to be performed from an imaginary line outside of the edge of the model, the index for the guide is set to the left of the character 1 and the index for the pivot is set equally to the right. The

or held at one of the edges of the pattern the point 78in a channel on the cutter Jhead andis *held down by .a retainer? 9 between itsends.

The pantograph linkage .-may be set for producing different sizes of secondary patterns. To do this, the slide 57 is adjusted along the link 4:5, with the effect of moving the block 52 :more or less away from the block 49 and thereby altering the amount by which the point at which the cutters act on the secondary pattern is distant beyond the edge of the model when enlarged patterns are made, or the amountby which the model projects beyond the acting point of the cutters, when reduced patterns are made. The adjustment is performed by a pinion 80 connected with a trunnion 81 having a bearing in the sliding block 58, and connected also with a handle 82lby which itmay be turned.

The pinion meshes with rack teeth 83 on the I.

edge of one of the 'link'bars 45. The slide is locked in posit-ion'by one or the other of two keys 83and 84 coacting with notches85, 86, respectively, in the opposite edges of a size plate 87 secured to the top of the link 45. The keys are formed on the inner edges of the upstanding ends of a plate 88 contained in a transverse slot in'the :block 58, said plate'being connected with the handle of the pinion by a ring or band '89 held between a shoulder of such handle and the pinion 80, and connected with the plate 88 by a pin 90 (Fig. 7). hen the handle is pulled away from the link the key 83 is moved 'into any notch beside which it may lee placed, and when the handle is pushed toward the link the key 84: may enter one of the notches "86. I provide a disabling device in the form of a ring 91 to make either of these keys inop erative. The ring may be slipped over the upright which carries the key, and when thus placed it engages the side of the link bar 45 when the key is moved toward the bar. The ring is prevented from falling out by lying in a recess between the key and the body of the plate, as shown in Fig. 10 in which notch ithas a close fit. The thickness of the ring is about equal to the depth of such recess, whereby it effectually prevents entrance of the key with which it is associated into the adjacent notch, while allowing the key on the opposite end of the sliding plate to move into and out of any one of its complemental notches. The ring may be engaged with either one of the keys. For the purposes of description the keys may be termed locks" and the ring a lock disabling detent. Then the machine is set for grading up, that is, for making enlarged patterns, the ring is engaged with the key at the right of the link as shown in Fig. 6; but when the setting is for grading down, that is, making reduced patterns, the ring is engaged with the other key. The notches are spaced according to the standard sizes of patterns and preferably the notched plate 87 has numbers besides the notches designating the sizes.

It will be noted that the link 43 is curved, being bowed outwardly between its pivots away from the cutter. This formation allows the jack to be brought close up to the cutter without causing the link 43 to strike the sliding block 58.

The operation of the machine will be readily understood from the foregoing de scription in connection with the drawings.

The jack is provided with handles 93, 94, placed conveniently for grasping by the hands of the operator. The movements of the jack are mainly back and forth past the end of the cutter head, and somewhat toward and from the latter according to the amount by which the pattern projects. It is not necessary to turn the jack in order to out along different sides of the pattern, because the latter and the blank may be turned in the jack through the rotatable mounting of the clamping heads.

It is sometimes necessary to reproduce on a larger or smaller scale patterns having edges inside of their peripheral or bound ing edges, of a character such as to form either notches, slots or recesses extending from one or more bounding edges, or inclosed open spaces within the body of the pattern, one of such open spaces being indicated at 95 in Fig. ll. In order that such notches, recesses, or openings may be graded correctly, I provide a modification of the pattern guide and its carrying bar, such as shown in Fig. 15. In this figure 69 is the pattern guide and 67 the bar carrying the same. Said bar has a pin 74 adapted to enter any one of the holes 73 in the guide or holder (36. This arrangement differs from that previously described in that the pin 74; is smaller than the holes 7 3, thereby providing for lost motion, and the guide 6W has a width from front to back exactly equal to the amount of this lost motion. Thus when the bar is moved forward until the pin 74; contacts with the forward side of the holes 7 3 in which it lies, the rear side of the guide 69 is then in the same position previously occupied by its forward side when the pin 74 was in contact with the rear limit of the containing socket 73. In all other respects the construction and arrangement of the parts of the machine are the same as already described. The purpose of this lost motion is to allow the elements which guide the several edges of the opening to occupy the same point with respect to the cutter, and not to cause the guiding point for different edges to be in effect shifted. For instance, those edges of the opening such as 95 and 95 which lie between the clamp and the opening are guided by the front side of the guide pin, but the opposite edge of the opening' such as 95, cannot be guided by this side of the )in because the holding jack and cutter head would interfere and prevent. Consequently such edge is guided by the rear side of the guide. If there were no lost motion the opening in the secondary pattern would be too narrow by the thickness of the guide pin, but when the guide can be shifted so that its front and. rear sides alternately may occupy the same point in space, the opening in the secondary pattern is made of the proper graded size.

I claim:

1. A. pattern grading and cutting machine, comprising a table or base, a cutter head secured to said table, a model and blank holding jack resting movably on the table, the latter being composed of alternating strips of metal and wood of which the metal strips rise above the wooden strips to diminish the frictional resistance to sliding movement of the jack, a proportioiuil motion miarhanism connecting the jack and cutter head, and a model guide connected lo a part of said proportional motion mechanism.

2. A pattern grading and cutting ma chine, comprising a movable jack for hold ing the model pattern and the blank, a stalionary cutter head, a propm'tional motion linkage connected to the jack and including a member movable proportionately to, and through distances less than, lhe movements of the jack, a cutter head, cutting means on the cutter head, a slide on the cutter head adjustable transversely of said cutting means, a pivot connecting said linkage to said slide, a guideway carried by said member, and a model guide slide adjustably held in said guideway.

3. A machine of the character described, comprising, a culter head, a cutter therein, a proportional motion mechanism, av movable model and blank holder ci'mnei'ttcd wilh said mechanisi'n, a pivot connected with said mechanism, a slide carrying said pivot and mounted adjustably on the cutter head, a model guide, and a slide carrying said guide and mounted adjustably on. a portion of said mechanism.

4. A. machine of the character described, comprising, a cutter head, a cutter therein, a proportional i'notion mechanism, a movable model and blank holder cormected with said mechanism, a pivot connected with said mechanism, a slide carrying said pivot and mounted adjustably on the cutter head, a model guide, and a slide carrying said guide and mounted aiiljustably on a portion' of said mechanism, and an index means associated with said slides to designate and measure the adjustments thereof.

A machine of the character described, comprising, a cutter head, a cutter therein, a proportional motion mechanism, a movable model and blank holder connected with said mechanism, arpivot connected with said mechanism, a model guideconnected with a part of said mechanism which is movable toward and from said pivot, means for securing the pivot at different points on the cutter head, means for securing the model guide at different points relative to said part, and indexes associated with said pivot and said guide for measuring the adjustments thereof. 7

6. In a machine of thechar-acter described, a jack for holding the model pattern and blank, said jack having parallel slots extend ing inwardly from one end thereof to contain the model and blank respectively,and clamping means at the open ends ofsuch slots, consisting of a clamping head held in the .upper'part of the jack, a clamping head held in the bottom of the'jack, a pin movable endwise in the intermediate part of the jack between the slots, heads on the ends of said pin opposedto and cooperating with the two aforesaidheads respectively, and an operating camlever pivoted to the top of the jack and arranged to press downwardly on the uppermost head;

7. In a machine of the character described, a jack for holding. the model pattern and blank, said jack having parallel slots extending inwardly from one end thereof to contain the model and blank respectively, clamping means at the open ends of such slots, and a cam lever pivoted on the jack arranged to operate simultaneously the clamping means for both the model andthe blank.

8. In a machine ofthe character described, cutting means for cutting oi the waste of a pattern blank, consisting of a reciprocat ing knife and a complemental disk, the knife being guided to travel across an edge of the disk in close proximity thereto, and the disk beingadjustable rotatably to place different parts of its edge beside the knife.

9. In a machine of the character described, in combination with a cutter head, a pattern carrier, proportional motion mechanism connected to said carrier and head, and a model pattern guide carried by a part of said mechanism, a cutter carrier guided" to reciprocate in said head, and a knife in said cutter carrier, the knife being a prismatic bar and the cutter having a socket of similar shape to receive it with a close fit, and the bar being both twisted and bent sons to bind yieldingly in the socket.

10. In a machine of the character" described, in combination with a model and blank carrier, and a cutter head, a proportional motion mechanism, a link forming'a part of said mechanism, a slide mounted on said link, a relatively movable member forming another part of said mechanism and having a swivel connection with said slide, a pinion carried by said slide meshing with rack teeth on the: link for adjusting the slide, andsbeing movableaxially, andalocking means carried by the pinion andar: ranged-to interlock With portions of the link in'responseto axial movement of the pinion.

11. In: a machine of the character described,.in combination with a model and blank carrier, and a cutter head, a proportional motion mechanism, including in part a@ link having a guidevvay, rack teeth, and locking notches, a slide ar rangedrmovably in said guideway, a pinion carried by said slide andimovable rotatably, andiaxially with respect thereto, meshingW-ith said teeth, and aikey connectedwith the pinion'and movable intoand out of said notches in-response to axial movements of the pinion.

'12. In a machine. of the character described, in combinationuwith a model" and blank carrier, and a cutter head,- a' proportional motioni mechanism, alinkifo'rmingf a part i of said mechanism, a slide mounted on said link, a relativ ely movable membenf'or-i ing another part of said! mechanism and havingaswivel connection with said slide, a pinion carried by; said slide meshingwith rack' teeth on the link. for adjusting; the slide, and being. movableaxia'lly, a locking meanscarried by; the pinion andiarranged to interlock with portions of: the link, in response to axial movement of; the pinion, and a disabling detent, for: preventing. action of said lockingfmeans.

13. In machine. of theacharacter described,; in; combination with ajmodel; and blankcarr-ier, andacutter head,;a proportional motion: mechanism, alink forming? a partQf- Said mechanism, a. slidemounted on saidllinkgga relativelyi movable member form ing-x another part of said mechanism=and havinga swivel connectionwith said slide, a pinion carried by said, slide, meshing With rack teethon: the link for adjusting the sl-ide, and being? movable; axially, a locking means carried by; the pinion and arranged to interlock with portions of the link in re,- sponse toiaxial movement of the pinion, and a; disabling detent engaged detachably, with saidkey for preventingentrance thereofiinto thenotches. I

l4:.-II1. L machine of the character. described, combination vvith, a;model and blank; carrier, and a cutter he ad,; aproportional motion mechanism, includingin part a linkhaving a guideway, rack teeth, and locking notches, on oppositesidsfa slide arranged movably in said. guideway, a pinion carried by said slide and'movab'l-e rotatably, and axially with respect thereto, meshinglwith said-teeth, and a plate crossing said slide protrudingetherefron'i at opposite sides of'thelink and havingkeys on its'en ds alined with. theoppositely located notches, said plate being connected with the pinion, whereby one orthe-other of such keys may be engaged with the corresponding notches by axial movement of the pinion.

15. In a machine of the character described, in combination with a model and blank carrier, and a cutter head, a proportional motion mechanism, including in part a link having a guideway, rack teeth, and locking notches on opposite sides, a slide arranged movably in said guideway, a pinion carried by said slide and movable rotatably and axially with respect thereto, meshing with said teeth, a plate crossing said slide protruding therefrom at opposite sides of the link and havin keys on its ends alined with the oppositeIy located notches, said plate being connected with the pinion, whereby one or the other of such keys may be engaged with the corresponding notches by axial movement of the pinion, and a detcnt detachably engageable with either key for preventing such key from entering the adjacent notches.

16. In a pattern grading and cutting machine a provision of means for producing an enlarged or reduced proportional pattern graded from the line at a predetermined uniform distance back of the edges of the model pattern, not only of that edge which overlaps an adjacent part of the upper, but also those edges which are seamed or corded and which provide a seam at the back of the upper and those which are lasted over.

17. A pattern grading machine comprising a guide for a model pattern, a holder for said guide, a cutter, a holder for model and blank, and a proportional mechanism connecting said model holder, cutter, and guide, the guide being connected with its holder with provision for lost motion of an amount equal to its front to rear action, whereby it may be shifted so that either its front or rear side may occupy the same point with respect to the cutter while remaining in the same fundamental adjustment.

18. In a pattern grading and cutting machine, the combination with blocks, said blocks having open slots to form guideways, of bars located in said slots and connected with different parts of a proportional motion mechanism, and plates overlying said bars and retaining the same in said slots.

In testimony whereof I have affixed my signature, in presence of two Witnesses.

ALBERT F. PRESTON.

Witnesses:

E. BATCHELDER, P. W. PEZZETTI.

Copies of this patent may be obtained for flve cents each, by addressing the Commissioner of Patents,

Washington, D. G." 

